148. AN INDOOR-OUTDOOR BUILDING ENERGY SIMULATOR TO STUDY URBAN MODIFICATION EFFECTS ON BUILDING ENERGY USE

Abstract
TUF-IOBES (Temperature of Urban Facets Indoor-Outdoor Building Energy Simulator) is a building-to-canopy model that simulates indoor and outdoor building surface temperatures and associated heat fluxes in an urban area to estimate cooling/heating loads and energy use in buildings. In this model the indoor and outdoor energy balance processes are dynamically coupled taking into account real weather conditions, indoor heat sources, building and urban material properties and composition of the building envelope (e.g. windows, insulation), and HVAC equipment. TUF-IOBES is also capable of simulating effects of the waste heat from air-conditioning systems on urban canopy air temperature. TUF-IOBES is validated against analytical heat transfer results and against previously validated and well-known building energy models. TUF-IOBES provides scientific and engineering results with policy relevance, for example by studying the holistic impact of heat island mitigation measures. An application of TUF-IOBES to study the impact of different pavements (concrete and asphalt) on building energy use is presented. The interactive effect of a large number of parameters such as building conditions (e.g. infiltration rate, construction materials, window type), ground surface albedo and canopy aspect ratio on building thermal loads is also investigated.